Abstract:In this paper, under the conditions of different desorption times and types, the leaching kinetics of total phosphorus (TP) and soluble total phosphorus (TDP) in facilities agricultural and sloping farmland soils in Dianchi Lake Basin were studied by adding soil ameliorants inculding ferrous sulfate (FES), aluminum sulfate (ALS), polyacryl amide (PAM), and soil disinfectant (penta chloro nitro benzene (PCNB) ). The results showed that TP content in the leaching of these two typical soils treated by FES, ALS and PAM rather than PCNB, was significantly reduced in the continuous desorption (2-10 h) cases and two kinds of desorption types (2 h strength desorption and 6 h continuous desorption) (p<0.05), The decreased TP content in the leaching increased with the increasing desorption time. Additionally, FES and PAM could significantly affect TDP leaching of facilities agricultural soils under continuous desorption and lower TDP leaching of two soil types under two desorption types. Field test showed that TP and TDP concentrations in runoff from the soils treated by FES, ALS and PAM were significantly decreased after adding soil ameliorants. This further suggested that the uses of FES, ALS and PAM have the positive effect on controlling phosphorus loss from soils. Considering the total effects of control phosphorus loss in terms of desorption time, desorption type and soil type, it is concluded that the uses of FES and PAM are more suitable in Dianchi Lake Basin.